X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=lib%2FDBIx%2FClass%2FResultSource.pm;h=ebbf960542bd735d13d58c9f7cd9b5a79f752693;hb=2df1857d287a0481224caef360f29b9eeb1421ae;hp=1da92f4b781183507400477919f9c43a866f23cb;hpb=c13002976e32b818eabc3a8eaf6fa2e23ebed7e9;p=dbsrgits%2FDBIx-Class.git

diff --git a/lib/DBIx/Class/ResultSource.pm b/lib/DBIx/Class/ResultSource.pm
index 1da92f4..ebbf960 100644
--- a/lib/DBIx/Class/ResultSource.pm
+++ b/lib/DBIx/Class/ResultSource.pm
@@ -250,9 +250,9 @@ sequence, if you do not use a trigger to get the nextval, you have to set the
 L</sequence> value as well.
 
 Also set this for MSSQL columns with the 'uniqueidentifier'
-L<DBIx::Class::ResultSource/data_type> whose values you want to automatically
-generate using C<NEWID()>, unless they are a primary key in which case this will
-be done anyway.
+L<data_type|DBIx::Class::ResultSource/data_type> whose values you want to
+automatically generate using C<NEWID()>, unless they are a primary key in which
+case this will be done anyway.
 
 =item extra
 
@@ -465,10 +465,11 @@ called after L</add_columns>.
 Additionally, defines a L<unique constraint|add_unique_constraint>
 named C<primary>.
 
-The primary key columns are used by L<DBIx::Class::PK::Auto> to
-retrieve automatically created values from the database. They are also
-used as default joining columns when specifying relationships, see
-L<DBIx::Class::Relationship>.
+Note: you normally do want to define a primary key on your sources
+B<even if the underlying database table does not have a primary key>.
+See
+L<DBIx::Class::Intro/The Significance and Importance of Primary Keys>
+for more info.
 
 =cut
 
@@ -503,6 +504,16 @@ sub primary_columns {
   return @{shift->_primaries||[]};
 }
 
+sub _pri_cols {
+  my $self = shift;
+  my @pcols = $self->primary_columns
+    or $self->throw_exception (sprintf(
+      'Operation requires a primary key to be declared on %s via set_primary_key',
+      ref $self,
+    ));
+  return @pcols;
+}
+
 =head2 add_unique_constraint
 
 =over 4